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proffer的第三人称单数（三单）为：proffers...
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I proffer to help him.我愿意帮助他.His proffer of advice was not accepted finally.他所提供的建议最后没被采纳.Proffer to help sb.表示愿意帮助某人....
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proffer的一般过去时为：proffered...
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proffer的音标：proffer的英式发音音标为：['prɒfə(r)]proffer的美式发音音标为：['prɑfə(r)]...
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proffer的现在进行时为：proffering...
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proffer的现在完成时为：proffered...